Sheet Metal Workers in the manufacturing industries produce large quantities of metal products for use in building and construction work, as well in appliances like the high-end Sub-Zero refrigerators, kitchen exhaust systems, shelving, lockers, and bathroom stalls. Signs are one of our industry’s most visible products. You see signs everywhere – on highways, on top of buildings, hanging outside stores, in amusement parks, or planted in the ground. Craftworkers in the sheet metal industry make the majority of signs, even signs made of plastics or neon tubing. Most work is done outdoors in the field although many members are involved in the design and construction of signs indoors. The signs that light up Times Square, Broadway, many of North America’s sports stadiums and even the New Year’s Ball are all built and maintained by the members of SMART.